linux-kernel - [PATCH AUTOSEL 5.12 058/160] clk: tegra: tegra124-emc: Fix clock imbalance in emc_set

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Message-Id: <20210706111827.2060499-58-sashal@kernel.org>
Date:   Tue,  6 Jul 2021 07:16:44 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Yang Yingliang <yangyingliang@...wei.com>,
        Hulk Robot <hulkci@...wei.com>,
        Thierry Reding <treding@...dia.com>,
        Sasha Levin <sashal@...nel.org>, linux-clk@...r.kernel.org,
        linux-tegra@...r.kernel.org
Subject: [PATCH AUTOSEL 5.12 058/160] clk: tegra: tegra124-emc: Fix clock imbalance in emc_set_timing()

From: Yang Yingliang <yangyingliang@...wei.com>

[ Upstream commit f13570e7e830ca4fbf4869015af8492b8918445e ]

After calling clk_prepare_enable(), clk_disable_unprepare() needs
be called when prepare_timing_change() failed.

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
Signed-off-by: Thierry Reding <treding@...dia.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/clk/tegra/clk-tegra124-emc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/tegra/clk-tegra124-emc.c b/drivers/clk/tegra/clk-tegra124-emc.c
index bdf6f4a51617..74c1d894cca8 100644
--- a/drivers/clk/tegra/clk-tegra124-emc.c
+++ b/drivers/clk/tegra/clk-tegra124-emc.c
@@ -249,8 +249,10 @@ static int emc_set_timing(struct tegra_clk_emc *tegra,
 	div = timing->parent_rate / (timing->rate / 2) - 2;
 
 	err = tegra->prepare_timing_change(emc, timing->rate);
-	if (err)
+	if (err) {
+		clk_disable_unprepare(timing->parent);
 		return err;
+	}
 
 	spin_lock_irqsave(tegra->lock, flags);
 
-- 
2.30.2